In most pre-1975 heating systems, the plenum and ducts are made of sheet metal. The ducts are rigid, and if they have any insulation it's been taped or strapped on after they were installed.

Sheet metal represents a critical part of an HVAC system’s infrastructure. Metal ductwork that is poorly fabricated or poorly installed can reduce a system’s efficiency, impact end user comfort, and ...

Description: The Eastern Sheet Metal Equivalent Round Duct Calculator app allows sheet metal contractors, installers, HVAC engineers, and contractors to quickly convert rectangular and flat oval duct ...

More than two years after an HVAC collapse at the Gaylord Rockies Resort, there are still no answers and no publicly ...

Nov. 21—Chehalis Sheet Metal, which has provided heating, cooling and solar installation throughout Southwest Washington since 1962, will give a new heating and cooling system to a family in ...